#include <iostream>
#include <vector>
#include <fstream>


using namespace std;



class Array
{
private:
	vector <int> a;
	int sluong;
public:
	Array();
	~Array();
	void nhap();
	void Nhap_tu_file(char *s);
	void Xuat();
	void Seclection_sort();
	void Heap_sort();
	void Quick_sort();
	void Radix_sort();
};